

class GroupType {

  static String? getGroupName(String customerId, String? groupName) {
    String? newGroupName;
    if(groupName==null){
      // 新版
      if(customerId[0] == "A" || customerId[0] == "B" || customerId[0] == "C" || customerId[0] == "D"){
        newGroupName = "CXC-${customerId[0]}組";
      }
    }
    return newGroupName;
  }


}